I always wondered that too! Personally though I think it’s a device that opens up a subspace window which enables a driver to disappear and re-appear in front of another car, as long as they’re within 3.14159 seconds of each other. It’s known as Bernie’s Ultimate Pi In The Sky Idea.

Its a miniture jet engine. Rather then take the KERs route of overtaking aids, F3 descided to employ mini Jets to their cars, which offer a 4second boost that can be employed 5 times in the race with unrestricted rules on where it can be used.

Nah Icthyes, it’d be more like 3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679821480865132823066470938446095505822317253594081284811174502841027019385211055596446229489549303819644288109756659334461284756482337867831652712019091456485669234603486104543266482133936072602491412737245870066063155881748815209209628292540917153643678925903600113305305488204665213841469519415116094330572703657595919530921861173819326117931051185480744623799627495673518857527248912279381830119491298336733624406566430860213949463952247371907021798609437027705392171762931767523846748184676694051320005681271452635608277857713427577896091736371787214684409012249534301465495853710507922796892589235420199561121290219608640344181598136297747713099605187072113499999983729780499510597317328160963185950244594553469083026425223082533446850352619311881710100031378387528865875332083814206171776691473035982534904287554687311595628638823537875937519577818577805321712268066130019278766111959092164201989 seconds apart, otherwise it wouldn’t work